Most men need between 56 and 91 grams of protein per day, depending on body weight, activity level, and goals. The baseline recommendation is 0.8 grams per kilogram of body weight (0.36 grams per pound), which works out to about 65 grams for a 180-pound man. But that number is a minimum to prevent deficiency, not an optimal target, and most active men benefit from significantly more.
The Baseline: What Sedentary Men Need
The Recommended Dietary Allowance for protein is 0.8 grams per kilogram of body weight per day. For a man who weighs 180 pounds (about 82 kilograms), that comes to roughly 65 grams. For a 200-pound man, it’s about 72 grams. This figure assumes you’re not exercising regularly and simply need enough protein to maintain basic body functions, replace daily losses, and avoid muscle wasting.
To calculate your own baseline, multiply your weight in pounds by 0.36. That gives you the floor. Most nutrition experts now consider this number conservative, especially for men who are physically active, trying to lose weight, or over 50.
How Much Protein for Building Muscle
If you’re lifting weights or doing any kind of resistance training, your protein needs jump considerably. The International Society of Sports Nutrition recommends 1.4 to 2.0 grams per kilogram of body weight per day for most exercising individuals looking to build or maintain muscle. For a 180-pound man, that’s roughly 115 to 164 grams daily.
Where you land in that range depends on intensity. A man who lifts three times a week for general fitness can aim for the lower end. Powerlifters, bodybuilders, or anyone trying to gain significant muscle mass should target the higher end, around 1.7 to 2.0 grams per kilogram. The American College of Sports Medicine recommends a similar range of 1.2 to 1.7 grams per kilogram.
There’s even some evidence that very high intakes above 3.0 grams per kilogram may help resistance-trained individuals lose fat, though that level (over 240 grams for a 180-pound man) is extreme and unnecessary for most people.
Protein for Weight Loss
Protein is the most satiating nutrient, and increasing your intake can make a real difference when you’re trying to cut calories. In one controlled study, participants who ate 30% of their calories from protein felt significantly more full than those eating 15% protein, even when total calories were identical. Over six months, people eating a higher-protein diet (25% of calories) lost 9.4 kilograms compared to 5.9 kilograms in a group eating a normal-protein diet (12% of calories), with fat intake held constant in both groups.
If you’re eating around 2,000 calories per day while trying to lose weight, aiming for 25 to 30% of those calories from protein works out to 125 to 150 grams. This range helps preserve muscle mass while you’re in a calorie deficit, which keeps your metabolism from slowing down as you lose weight.
What Changes After 50
Aging muscles become less responsive to protein. Younger men can trigger muscle repair with relatively small servings, but older adults need a higher dose at each meal to get the same effect. Research on sarcopenia (age-related muscle loss) shows that muscle building is blunted in older individuals when protein intake drops below about 20 grams per meal.
The practical recommendation for men over 50 is to hit 25 to 30 grams of high-quality protein at each meal, spread evenly throughout the day. This consistent stimulus matters more with age than it does for younger men, who can get away with uneven distribution. For endurance athletes over 50, the target climbs to around 1.8 grams per kilogram per day.
Endurance Athletes Need More Than You’d Think
Runners, cyclists, and swimmers burn through amino acids for energy during long sessions, which means they need more protein to recover than someone doing shorter workouts. The recommended target for serious endurance athletes is around 1.8 grams per kilogram per day. For a 180-pound runner, that’s about 147 grams. The extra protein replaces what your body oxidizes for fuel during extended efforts and supports repair of muscle fibers stressed by repetitive impact.
How to Spread Protein Across the Day
Your body can only use so much protein at once for muscle repair. Research shows that about 30 grams of protein in a single meal is enough to maximize muscle protein synthesis, and going above 40 grams in one sitting doesn’t appear to provide additional muscle-building benefit in that immediate window. This means eating 150 grams of protein in two large meals is less effective than splitting it across four or five meals and snacks.
A practical approach: aim for at least 30 grams at breakfast, 30 grams at lunch, 30 grams at dinner, and fill the rest with snacks. Breakfast deserves special attention because most men front-load their protein at dinner and eat very little in the morning. Starting the day with 30 grams or more of protein sets up a better pattern for muscle maintenance and satiety throughout the day.
If you exercise, consuming 15 to 25 grams of protein within two hours after your workout supports muscle repair. Studies show that about 20 grams post-exercise is enough for recovery, and higher amounts don’t add measurable benefit in that immediate period.
Animal vs. Plant Protein
Not all protein sources are equal. Animal proteins from meat, eggs, dairy, and fish contain all the essential amino acids your body needs in the right proportions and are more digestible than most plant proteins. When researchers compare the digestibility scores of animal-based and plant-based foods, animal sources consistently score higher.
This doesn’t mean plant protein can’t meet your needs. It means you may need to eat slightly more total protein if plants are your primary source, and you should combine different types (beans with grains, for example) to cover all the amino acids. Men eating a fully plant-based diet often aim for the higher end of whatever protein range applies to their activity level, adding an extra 10 to 20% as a buffer for lower digestibility.
Quick Reference by Body Weight
- 150-pound man, sedentary: 54 grams per day (0.36 g/lb)
- 150-pound man, active: 95 to 136 grams per day (1.4–2.0 g/kg)
- 180-pound man, sedentary: 65 grams per day
- 180-pound man, active: 115 to 164 grams per day
- 200-pound man, sedentary: 72 grams per day
- 200-pound man, active: 127 to 182 grams per day
- Men over 50, any weight: at least 25–30 grams per meal, three times daily
These ranges assume healthy kidney function. Men with existing kidney disease should work with their care team before increasing protein intake beyond the baseline RDA.